feat: deposit presets UI, back button in history, onFocus select on inputs

- DepositSettingsPage: deduction presets management (add/edit/delete inline)
- DepositHistoryPage: "← Назад" link back to settings
- Amount inputs: onFocus selects all text

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/DepositHistoryPage.tsx

@@ -1,5 +1,6 @@
 import { useState, useEffect } from 'react'
-import { Loader2, ShieldCheck, CreditCard, Banknote, RefreshCw } from 'lucide-react'
+import { Loader2, ShieldCheck, CreditCard, Banknote, RefreshCw, ArrowLeft } from 'lucide-react'
+import { Link } from 'react-router-dom'
 import { api, type BookingDeposit } from '../lib/api'
 import { useAuth } from '../contexts/AuthContext'
 import { cn, formatCurrency } from '../lib/utils'
@@ -40,14 +41,17 @@ export function DepositHistoryPage() {
   return (
     <div className="p-4 md:p-6 space-y-5 max-w-4xl">
       <div className="flex items-center justify-between flex-wrap gap-2">
-        <h1 className="text-xl font-bold text-slate-900 dark:text-slate-100 flex items-center gap-2">
-          <ShieldCheck size={22} className="text-brand-600" />
-          История депозитов
-        </h1>
-        <button
-          onClick={load}
-          className="btn-secondary flex items-center gap-1.5 text-sm"
-        >
+        <div className="flex items-center gap-3">
+          <Link to="/settings/deposit" className="flex items-center gap-1.5 text-sm text-slate-500 hover:text-slate-700 dark:hover:text-slate-300 transition-colors">
+            <ArrowLeft size={16} />
+            Назад
+          </Link>
+          <h1 className="text-xl font-bold text-slate-900 dark:text-slate-100 flex items-center gap-2">
+            <ShieldCheck size={22} className="text-brand-600" />
+            История депозитов
+          </h1>
+        </div>
+        <button onClick={load} className="btn-secondary flex items-center gap-1.5 text-sm">
           <RefreshCw size={14} />
           Обновить
         </button>